truth for declarative infrastructure and application code. In GitOps, the desired state of the system is versioned and stored in a Git repository, and a reconciliation loop continuously monitors and published by the GitOps Working Group: The desired state of a GitOps managed system must be: 1. Declarative A system managed by GitOps must have its desired state expressed declaratively the source. 4. Continuously reconciled Software agents continuously observe the actual system state and attempt to apply the desired state. The Philosophy of GitOps | 07 3 KEY ELEMENTS

• GitOps for Kubernetes Essentials • Conclusion Git is the most widely used version control system, with more than 80 percent of its market share in today’s software industry. GitOps is a methodology infrastructure definitions can be kept alongside application code in Git. Keeping your entire system in Git means that your development team uses familiar Git-based workflows and pull requests to (VCS) like Git should be the only source of truth. Whatever changes one wants to perform in the system should be declared and always committed first in Git or the GitLab repo alone. This helps to identify

pipelines GENERAL DISTRIBUTION 17 What is Cloud-Native CI/CD? Designed with microservices and distributed teams in mind OPENSHIFT PIPELINES Containers Built for container apps and runs on Kubernetes

unrelated. Is GitOps something that application developers use? Is it for infra- structure folks or system administrators? Is it something you can buy off the shelf? Or is it just a fancy new term for DevOps change took down their entire hosting platform, but the DevOps engineers were able to bring back the system in about 40 minutes. When asked how they did it so quickly, they described their process, which cofounder Alexis Richardson called “GitOps.” The DevOps engineers over at Weaveworks came up with a system that allowed them to return their entire platform (not just the workloads running on them) back

significantly speed up your team’s ability to ship features. eBook 4 The Principles of GitOps The entire system is described declaratively. Kubernetes is just one example of many modern cloud native tools that reproduced. --------------- --- The canonical desired system state is versioned in Git. With the declaration of your system stored in a version control system, and serving as your canonical source of truth automatically applied to the system. Once you have the declared state kept in Git, the next step is to allow any changes to that state to be automatically applied to your system. What’s significant about

delivery teams can release software continuously, and with full confidence in the reliability of the system. THE GITOPS GUIDE TO BUILDING & MANAGING INTERNAL PLATFORMS 3 weave.works ▼ Self-service In the past, the only way a developer could get access to servers, data, or software was to ask a system administrator. In the modern era, however, developers require on-demand access to a variety of tools 3. Enforce zero-trust security 4. Sidecars enable better security A platform is an intricate system and it cannot be bought ready made from any vendor. It’s something that needs to be custom-built

apply when implementing and dealing with GitOps. Let’s take a look. Declarative system In the GitOps model, the complete system is configured declaratively. This declarative approach is focused on the result facilitating convenient deployments and rollbacks. The system state is versioned in Git All the declarative states are stored in the version-controlled system, which acts as the single source of truth. With With this version-controlled approach, all the system infrastructure changes are available chronologically, enabling users to identify infrastructure changes over time easily. It is also helpful in: Troubleshooting

straight-forward: ● Infrastructure as Code: Git is always the source of truth on what happens in the system ● Code changes always go through an automated process ● Deployments, tests, and rollbacks controlled at any moment. Those continuously compare the current state with the desired state to ensure the system is running like expected. The most popular GitOps tools today are ​Flux ​and ​ArgoCD​. As several GitOps has been heralded as a way to decouple CI from deployments. In the classic use of a CI/CD system, the last step in the pipeline is a deployment step. Classic pipeline With GitOps you

code. The system’s entire infrastructure must be described in Git. After a PR is merged, the changes are automatically applied using tools like Weave Kubernetes Platform. Once the system is described require cluster credentials or manual intervention to make a change to the system. As a segregated environment, the system can only be changed through Git, thereby reducing user error and speeding WKP includes enterprise-grade features that extend the richness of GitOps using a model-based system to configure and define clusters and components. The underlying architecture of WKP is based entirely

日志 监控告警 Lifecycle Management 网络 计算 存储 数据库 System Resource Monolithic Sprint Cloud Coding VScode EFK Prometheus Serverless Tencent Serverless System Resource Mysql Ceph Docker KVM 业务运维 平台运维 … System Resource Serverless 介绍 什么是 Serverless Application ❑ 无服务器：不代表真的不需要服务器，只不过服务器由云厂商维护 ❑ 是一种软件系统架构思想和方法，不是软件框架、类库或者工具 ❑ 核心思想：无须关注底层资源，比如：CPU、内存和数据库等，只 需关注业务开发 用户运维 Cloud Vendor System Resource